CORRELATION BETWEEN THE INTERFACE STRUCTURE AND MAGNETIC AND TRANSPORT-PROPERTIES FOR CO CU(110) AND NI8FE2/CU/CO/CU(110) SUPERLATTICES/

The correlation between the interface structure and magnetic and trans port properties for single-crystal Co/Cu(110) and Ni8Fe2/Cu/Co/Cu(110) superlattices has been investigated. The interface structure was chan ged by changing the argon acceleration voltage of the-ion beam sputter ing and by annealing the samples. The interface structure was analyzed by simulating the Co-59 NMR spectra. NMR is sensitive to the atomic c onfiguration, and as a result, various interface structures (atomic co nfiguration) were obtained, while the other structures remain unchange d. There was a correlation between the atomic configuration and magnet ic and transport properties, i.e., the giant magnetoresistance, the ma gnetization, and the interlayer exchange coupling between the ferromag netic layers. Both interlayer exchange coupling and magnetization at t he interface correlate with the interface structure. The interface str ucture is important in causing both antiferromagnetic coupling between magnetic layers and a large magnetic moment at the interface, and the refore plays an important role in producing giant magnetoresistance.